In the past I went through a period that felt like depression, though I never talked about it to anyone so of course I wasn't diagnosed at any point. I went against your warning and played the game. The protagonist started off with more social support than I did. I chose the responses that I think I would have given when I felt depressed. This resulted the protagonist never seeking therapy or medication, and what is labeled "endingZero".

Depression Quest seems accurate. Now I feel bad. (edit: But I did get better.)